Shock absorber



Feb. 12, 1935.

B. l.. MALLoRY 1,990,997

SHOCK ABSORBER Filed Sept l2. 1933 2 sheqts-sneet 1 INVENTOR.

ATTORNEY.

Feb. 12, 1935. B. L. MALLORY 1,990,997

SHOCK ABSORBER Filed Sepb. l2, 1933 2 SheetS-Sheet 2 l INVENTOR.

ATTORNEY.

'.Patentecl" Feb.` 12, 19;'55

STATES' f -1,999,997y y Y l sHooKABsfonBEn :Bonnie L. Mallory,` Cleveland-Ohio, assignor to Gadgets `Incl,` Cleveland, Ohio; a corporation i Appr-teatrali septeniberianss, seal No. 639,111 solaims.` (cries-1190) fThis invention relates to a shock absorber of `the `friction brake, snubberV type and has for its princpalrobject to produce agdevice of this type of the simplest` andfmost inexpensive construc-` tion while securing eiciency in operation, durability and convenience of assembly.

Other and more limited-objects will become apparent from thefollowing `description when taken in connection with `the accompanying drawings in which Fig. 1 is a sectional `View taken at rightangles `to the, axis of the drumyvFig. `2 isga section` on. the liner 2--2 ofi Fig. 1; Fig. 3 is a detail of an expansible unit;Fig. 4 is an explodedV view of` the` same omitting the springs; Fig. 5 is Aa section on line\5-.5 Vof Fig.,4; Fig.`

6' isa section on line "6,-7-6 of Fig. 4; Fig. '7 is a view similar to Fig. 4 showing a modifiedrform of expansible unit; `Fig..8 isa section corresponding to either of the lines 8--8 of` Fig. '7;7Fig. 9 isi a detail. view of a further modified form of expansible'unit; and Fig. 10 isa section vonline 10--10 of Fig.` 9. l j `lteferring now'` toV the accompanying drawings, thenumeral loindicates'the frame memr ber `of a Vehicle,such as an automobile, to which my improved shock absorber is adaptedto beV 1 `which is `connected to the housing member by spot welding or other suitable means.

J ournaled within the bushings 18 is a shaft 19 to which is keyed, as indicated at 20, a drum member 21. The shaft 19 terminates in a polygonal portion 22 to which an arm is adapted to be connected. The drum member 21 `may be Va casting providedwith a cylindrical drum surface 21a and sealing cylindrical anges 21.b concentric with the drum surface 21a. The ends of the'Y flanges 21b are preferably provided with grooves 21c between which and the flanges of the members .16 andl'l are positioned deformable sealing` washers"V 23. With these sealing Washers in position, grease may be packedintoj the spaces 24`and 25 without danger of leaking the housing where it would comeinto contact with the friction surface of the drum. Any suit- VPii'li31irr OFFICE,

able means may be provided for. preventing the.

escape of 'lubricant from the space 25 around Vthe shaft 19. i

Received on the bolt 14 is the bent-overend2 of a exible metall strip 27 `which surrounds a friction bandlf28rand terminates at its other end v in a `radially outwardlyY `extending `abutment 29.

Attached tothe housing member 11 is a second abutment 39 `which may be spot welded thereto. It wil1 bewnoted that the abutment 29` is located between the bolt `14 and the abutment 30.

`Interposeol between the-abutments29 andd 3,0` l

is an expansible unit indicated generally byrthe` numeral 3lwwhichis adapted tourgefthel said abutments to separate, thereby tending to tighten the friction band against the drum 21. In view of the fact that the space between the abutments is small and it is mostconvenientto introduce expansion springs thereinto after the assembly of the other parts of the shock absorber except the `cover `12, `it would beyery` diflicult to r insert a plurality of `separate springs intofposi-V` tion between such abutments. Accordingly, "I

have providedga `self-contained` resilient unitinf-Y cluding aplurality of springs sufliciently narrow tobe receiyedin the space between the housing and drumand embodying r containing-and-guide means` for holding such springs in proper position4 and rendering them readily insertable and removable as `a self-contained unit. The unit 31 may take any one` of several forms,` three of whienhavebeen illustrated by Way of example.r The form shown inFigs. 3 to6 comprisesa U-ohapeclchannel member BZVhaVin/glegs of `C shaped cross section and-a `Ufshaped bar 33` adapted to telescope within the channel of the member 32. The bight portionsof the membersv 32 and `33 are provided withfa plurality of bosses 34 adapted to Areceive the endsof any desired number of coil compression springs 35. After the springs are placed in position on the bosses 34, 'the whole may be compressed to the proper length to fit between the abutments 29 and 30 and to exerta predetermined pressure tending to separate them. f 'r In Figs. 7 and 8 Ihave shown a unit madeup l of a pair of` identical members 36 each of which comprises a- U-shaped memberr having one of the legs G-shaped in cross section and the other of asize to `be received within the o-shaped channel ofthe complementary member. The bight portions may be channel-shaped or otherwise optionally, and are provided with bosses 3'? adapted to receive `compression springs thereon.

This form will be advantageous in that it will be necessary to manufacture only one shape.

In Figs. 9 and 10 I have shown a unit made up of a pair of telescoping U-shaped members 38 and 39, one adapted to telescope within the other and the legs of both being slightly curved in cross section. The bight portion of both members is provided with a plurality of bosses 401 to receive the springs as in the other forms.

From the foregoing, it will be seen that when the arm rotates in a counterclockwise direction as seen in Fig. l, both the 'friction between the friction band and drum 2l and the resiliency of the springs 35 will tend to tighten the friction band whereby to increase the snubbing'effect and that when the arm is rotated in the opposite direction, the resiliency ofA the springs will tend to tighten the friction band while the force of friction tends to loosen it. The resultis that by properly selecting the strength and number of springs, yit is possible to secure within desirable limits any ratio of .up and fdown snubbing effect.

It will thus be clear -that by the useof very simple mechanism, I have produced an arm snubber which is well adapted for itsintended purpose and quite exible as to Snubbing effect and differential between up and down strokes. While I have shown and described'the preferred embodiment of my invention, I wish it understood that I am not limited to details thereof but only in accordance with the appended claims and the prior art. l i

Havingr `thus described my invention,'what I claim is: i 1. In a shock absorber, a casing, adrum journaled therein, a friction band surrounding said drum, a sheet metal strip surrounding said friction band, said band being anchored to said casingat one end and provided at the other with an outwardly extending abutment, an inwardly extending abutment fixed on said casing and an expansible unit interposed between said abutments and insertable and removable therefrom as a self-contained unit, said expansible unit including a plurality of compression springsand an expansilole and eontractible holder therefor.

2. In a shock absorber, a casing, a drum journaled therein, a friction band surrounding said drum, a sheet metal strip surrounding said friction band, said band being anchored with respect to said casing at one end and provided at the other with an outwardly extending abutment, aninwardly extending abutment fixed on said casing and an expansible unit interposed between said abutments and insertable and removable therefrom as a self-contained u nit, said expansible unit including a plurality of compression springs `and an expansible and contractible holder therefor, said holder comprising a pair of U-shaped members, two of the legs of said pair of lJ-shaped members being of channel cross-section and the other two legs adapted to telescope therein.

3. In a shock absorber, a casing, a drum journaled therein, a friction band surrounding said drum, a sheet metal strip surrounding said friction band, said band being anchored with respect to said casing at one end and provided at the other with an outwardly extending abutment, an inwardly extending abutment fixed on said casing and an expansible unit interposed between said abutments and insertable and removable therefrom as a self-contained unit, said expansible unit including a plurality of compression springs and an expansible and contractible holder therefonsaid holder comprising 'a pair of U-shaped members, one leg of each of said U- shaped vmembers being C-shaped in cross section and the other leg adapted to telescope within the channelled leg of the other member.

4. In a shock absorber, aicasing, a drum journaled therein, a friction bandsurrounding said drum, a sheet metal strip surrounding said friction band,`said band being anchored with respect to saidV casing at one end and provided at the other with `a right angularly outwardly extending abutment, an inwardly extending abutment xed on said casing andan expansible unit interposed between said abutments and insertable and removable therefrom as a self -contained unit, the point of anchorage of said strip and said abutments being in substantial alignment. Y

5. In a shock absorber, a casing, a drum journaled therein, a friction band surrounding said drum, a sheet metal strip surrounding said friction band, said band being anchored with respect to said casing at one e'nd and providedat the other with a radially outwardly extending abutment, an inwardly extending abutment xed'on' said casingA and an expansible-unit interposed between said abutments and insertable and removable therefrom as a self-'contained unit,l said ex'- pansible unit including a plurality of compression springs and an expansible and contractible4 holder therefor, said holder comprising a pair of U-shaped members, curved in cross section and having the legs of one telescoping between those of the other. l

` BONNIE L. MALLORY. 

